... Steel Pipe 4. Material: Carbon Steel: ASTM A106 Gr. B, ASTM A53, Gr. B, ASTM A105, ASTM A234 Line Pipe: API 5L Gr. B ... , X52, X56, X60, X65, X70, X80 5. Standard: ASME/ANSI, ASTM, DIN, JIS, BS, EN, GB, API 6. Productive Technology: Hoe ... after sighing the contract, according to the real order quantity ASTM A53 API5l ERW Steel Pipe